10
GENERAL CHARACTER OF THE DISTRICT

TOPOGRAPHY
' General Statement

The Mackenzie basin, covering as it does some 682,000 square miles of
territory in northwestern Canada, necessarily embraces a great variety of topo-
graphic forms. Its longer axis, about 1,350 miles in length, conforms in its
direction to the trend of the main physiographical features and strikes northwest-
ward. In width it ranges from 100 miles at the mouth of the river, to 900 miles

near the centre of the basin.

Figure 1. ice ae of the Mackenzie River basin, and its main physiographica] features,

It includes within these boundaries three main physiographic provinces

_ (Figure 1) each of which runs almost the whole length of the basin and has

characteristics which sharply distinguish it from the adjacent provinces. The

a